quicklisp-abcl: robustify loading

This patch robustifies the process followed by invoking ABCL as:
abcl --eval "(require :abcl-contrib" --eval "(require :quicklisp-abcl)"
will get ABCL running with an active Quicklisp, downloading components
as necessary.
Try ng to produce and use compiled artifact for
<file:~/quicklisp/setup.lisp> if possible between invocations of the
implementation.